lundell



No. 626,708. Patented lun@l I3, |899. R. LUNDELL.

ELECTRIC MOTOR. Application led July 16, 1898.)

2 Sheets-Sheet I.

{No Model.)

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No. 626,708. Patented 1m I3, 1899.

' n. LUNDELL.

ELECTRIC MOTOR.

(Application filed July 16, 189B.)

(No Model.) 2 Sheets-Sheet 2.

INVENTOFL UNITED STATES PATENT OFFICE.

ROBERT LUNDELL, OF NEV YORK, N. Y., ASSIGNOR OF TVO-THIRDS TO THE SPRAGUE ELECTRIC COMPANY, OE SAME PLAGE.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 626,708, dated June 13, 1899. Appiimion inea my 1e, 189s. serai no. 686,134. (No model.)

To all w/'tom/ t may concern:

Be it known that I, ROBERT LUNDELL, a citizen of the United States, residing at New York, in the county of New York and State of New York, have made a new and useful Invention in Electric Motors, of which the following is a specication.

My invention is directed in particular to improvements upon electric motors disclosed in prior patents of mine, No. 481,701, granted August 30, 1892, and No. 587,531, granted August 3, 1897 and its objects are, first, to provide simple and efficient means for detaohably securing the oommutator-brushes in place and connecting the same with the ends of the current-carrying wires or conductors, and, second, to provide simple and efcient means for securing the fan-protecting frame to the body of the motor and its supporting-standard.

My invention will be fully understood by referring to the vaccompanying drawings, in which-'- Figure l is a broken sectional view taken through the body of the motor and the fan-protecting frame,the armature-shaft being shown in side elevational view and the rotary fan attached to one end thereof in dotted lines. Fig. 2 is a transverse sectional view taken through the body of the motor and one of the commutator-brushes and its supporting and attached parts, the armature, the fan-protectin g frame,

and the fan being removed. Fig. 3 is an enlarged longitudinal sectional view taken through the body of one of the commutatorbrush es and its supporting and attached parts, the inleading wire being disconnected therefrom, the commutator against which the brush rests being shown in part elevational view.

place.

ed by an energizing field-magnet coil, the axis of which is inclined at an angle to the armature-shaft O, supported in journal-bearings J J, (see Eig. 2,) castin removable end plates R R', the'armature being supported by said shaft between the overlapping field-magnet poles. The end plates R R are each provided with one or more pairs of bolt-holes, adapted to receive correspondingbolts B B, made,preferably, of nonmagnetic material, such as brass, and provided with nuts N N. (See Fig. 2.)

d d are dowel-pins located in drill-holes in the inner faces of the duplicate or interchangeable parts P P,and d d d d' are corresponding dowel-pins located in drill-holes in the outer faces of said parts and also in corresponding drill-holes in the end plates R R', the entire,

arrangement being such that when the fieldmagnet coil is put in place over the overlapping pole-pieces, the armature and its connected commutator V, carried by the shaft O, slipped into position, and the opposite ends of the shaft inserted through the journalbearings J J in the end plates R Rt, all of said parts are securely held together by the dowelpins d d d d', bolts B B, and nuts N N.

It will be apparent on inspection of Fig. 2 of the drawings that the several parts of the ie'ld-magnet frame of the motor are held to'- gether by the action of the bolts B B upon the endplates R R and that said bolts pass through openings between the shell-like portions P P' of the body part of the field-magnet and the overlapping field-magnet poles, thereby avoiding the necessity of drilling or otherwise weakening any portion of the tield- IOO -under surfaces, as shown.

oil-grooves located near the innerends of said j ournal-bearin gs,which grooves are connected to their corresponding oilwells by downwardly-extending ducts Q.

O represents a lubricant in each ofthe wells V W', and fw represents Vfibrous material, such as waste cotton, adapted to convey the oilby capillary action to the ends of the journal-bearings J J, the arrangement being such that as the lubricant is carried upward and advances inward toward the armature it ultimately descends by way of the grooves T and ducts Q to the wells XV', thus providing means for preventing it (the lubricant) from in any way coming into contact with the operative parts of the motor and affording a means for continuously lubricating the bearings.

M M represent removable caps or covers for the oil-wells, secured by chains to the end plates R R'.

S represents a hollow metallic standard provided with three or more legs L L L', adapted to receive rubber cushions in their Through 'the upper part of said standard are drilled screwholes, adapted to receive screws S2 s2, extending into corresponding screw-holes in the duplicate or interchangeable parts P P', their function being to detachably secure the standard S in said parts.

C represents a curvilinear protecting rim or cup at the top of the standard, adapted to surround or protect the opening through which the wires IV W pass downward and to give to the structure a neat or compact appearance when the supportingstandard is secuied to the bodypart of the motor, as described. v

L represents the control-switch, pivotally secured beneath the bottom of the standard and operatively connected with the usual rheostat, to which the lower ends of the wires w 1U are connected in a well-known manner.

I I represent insulating-sleeves. secured by set-screws Z in transverse openings entering the end plate R.

S S' represent metallic guiding-sleeves sef cured by pins p p to the inner side of the insulating-sleeves I I, the function of said sleeves S being to act as conducting-guideways for the commutator-brushes CB CB, preferably of carbon and of cylindrical form and recessed at their outer ends for the purpose of securing thereto the inner ends of compressible conducting-springs S2 S2.

K K are detachable caps each provided with a drill-hole e of substantially the same diameter as the corresponding drill-holes in the outer ends of the sleeves S S. The removable caps K K are recessed after the same manner as are the outer ends of the carbon brushes CB CB for the purpose of receiving the outer or free ends of the eolnpressible conducting-springs S2 S2.

J' represents a metallic sleeve secured to the free end of the inleading wire running from the source of current-supply (not shown) and provided at its free end with a pair of yielding metallic arms tt, adapted to offer considerable frictional resistance when inserted through the holes e of the caps K and the corresponding holes in the sleeves S', when said caps are pressed downward and the springs S2 put under compression, allas shown in Fig. 2, thereby causing the commutatorbrush to rest yieldingly against the commutator V and to advance as they are worn away `in substantially the same manner as do the commutator-brushes in connection with the motordisclosed in my priorpatent`,No.48l,70l, above referred to, this part of my improvement being directed to a simple and efficient manner of affording access to the com mutatorbrushes disclosed in the aforesaid patent.

R2R3 R4 represent metallic rings which constitute the body of the fan-protecting frame, said rings being held together by radially-disposed curvilinear wires D D, said protectingframe in itself being a well-known structure and not herein claimed by me, the only feature of novelty in this particular being directed to the means of supporting the frame, which means consists of lugs G G, secured to the inner rings R2, which in turn are secured by screws s' s to iiattened surfaces E E near the base of the standard S, the upper side of the fan-protecting frame being secured by a do wnwardly-extending arm F, attached to the inner ring R2, its lower end being bent at an angle and secured to the duplicate or interchangeable parts P P by screws s s, extending downward through drill-holes in a metallic eye H, which serves the double function of securing the arm F in place and also affords a means for suspending the motor by a cord or chain or for moving it by hand from place to place.

Prior to my improvement it was customary to sustain the protecting-frames of rotary electric fans by arms running from the inner surface of the frame radially toward the body of the motor itself, and the especial feature of novelty in my improvement lies in supporting the lowerside of the protecting-frame directly upon the standard which supports the motor and the upper portion thereof by an arm running to the body of the motor-frame, such an arrangement affording much greater rigidity than was possible with supportin g means running radially toward the body of the motor itself.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

l. An electric motor provided with commutatorbrushes inclosed each in a guidingsleeve having a transverse opening at its outer end, in combination with a yielding spring one end of which is adapted to bear on the outer end of the brush and a removable cap adapted to bear against the outer end of the spring, said cap being provided with an opening cor- IOO responding to the opening in the sleeve and adapted to be in alinement therewith When fprced into position Within the sleeve,substan tially as described.

2. An electric motor provided with commutator-brushes inclosed each in a guiding sleeve having a transverse opening at its outer end, in combination with ayielding spring one end of which is adapted to bear on the outer end of the brush, an d a removable cap adapted to bear against the outer end of the spring, said cap being provided with an opening corresponding to the opening in the sleeve and adapted to be in alinement therewith when forced into position Within the sleeve,together with an inleading Wire or conductor provided with yielding metallic arms adapted to enter the openings in said sleeve and cap, substantially as described.

3. An electric fan-motor having a supporting-standard for the body of" the motor, in combination with a protecting-frame for the fan, together With means for securing said frame to the supporting-standard and additional means for securing itto the top part of the body of the motor, substantially as described.

4. An electric fan-motor having a supporting-standard for the body of the motor, iny

combination with a protecting-frame for the fan; together with lugs G G secured to the protecting-frame and to the base of the supporting-standard, in combination With an arm extending from the top of said frame to the top partof the body of the motor and secured thereto by a metallic eye H and screws s S, substantially as shown and described.

5. An electric fan-motor having a supporting-standard for the body of the motor, in combination With a protecting-frame for the fan, together With means for securing said frame to the supporting-standard; and additional means for securing it to the body part of the motor, substantially as'descrbed.

In testimony whereof I have hereunto sub- 45 scribed my name this 6th day of July, 1898.

ROBERT LUNDELL. Witnesses:

D. C. DURLAND, C. J. KINTNER. 

